Permutation & Combination Model Questions Set 1 Practice Questions Answers Test with Solutions & More Shortcuts

Question : 16

There are 100 students in a college class of which 36 are boys studying statistics and 13 girls not studying statistics. If there are 55 girls in all, then the probability that a boy picked up at random is not studying statistics, is

a) 1/5

b) 2/5

c) 4/5

d) 3/5

e) None of these

Question : 17

In how many ways can six different rings be worn on four fingers of one hand ?

a) 15

b) 12

c) 16

d) 10

e) None of these

Question : 18

From amongst 36 teachers in a school, one principal and one vice-principal are to be appointed. In how many ways can this be done ?

a) 1240

b) 1250

c) 1800

d) 1260

e) None of these

Question : 19

The committee should consist of 2 Professors, 2 Teachers and 1 Reader?

a) 55

b) 225

c) 90

d) 450

e) None of these

Question : 20

In how many different ways can the letters of the word 'OFFICES' be arranged?

a) 1850

b) 5040

c) 1680

d) 2520

e) None of these